Although using a compatible device, SmartRace can’t be bought on Google Play (Android)
If you’re sure your device is matching all requirements to run SmartRace but the app is still flagged as incompatible on Google Play, you may want to give the app “Market Helper” a try. This app may bypass the compatibility checks and allow you to install SmartRace.
Important: there is no guarantee that SmartRace will work correctly on your device if you manage to install it this way.
Thanks to user Christian Döhl for the hint!